Originally Posted by crich775
That's just an AC LP valve kit + delrin bolt from the looks of it made for the sniper valve.
(I know the empire sniper uses some random non-standard valve, im thinking merlin for some reason...)
Either way, look up AC LP valves to read about the benefits.
as far as the bolt, its a pump, doesn't matter all that much.
It uses a Piranha GTI valve body.
BTW I would skip it.